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3fcb37f246
* Reformat base64 encoded messages to shorter lines * Remove storing debug versions * Add example test email * Update linelength to 76 * Revert changes in pre-commit --------- Co-authored-by: Adrià Casajús <adria.casajus@proton.ch>
42 lines
1.3 KiB
Python
42 lines
1.3 KiB
Python
import re
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from email import policy
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from email.message import Message
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from app.email import headers
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from app.log import LOG
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# Spam assassin might flag as spam with a different line length
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BASE64_LINELENGTH = 76
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def message_to_bytes(msg: Message) -> bytes:
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"""replace Message.as_bytes() method by trying different policies"""
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for generator_policy in [None, policy.SMTP, policy.SMTPUTF8]:
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try:
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return msg.as_bytes(policy=generator_policy)
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except Exception:
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LOG.w("as_bytes() fails with %s policy", policy, exc_info=True)
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msg_string = msg.as_string()
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try:
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return msg_string.encode()
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except Exception:
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LOG.w("as_string().encode() fails", exc_info=True)
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return msg_string.encode(errors="replace")
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def message_format_base64_parts(msg: Message) -> Message:
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for part in msg.walk():
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if part.get(
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headers.CONTENT_TRANSFER_ENCODING
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) == "base64" and part.get_content_type() in ("text/plain", "text/html"):
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# Remove line breaks
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body = re.sub("[\r\n]", "", part.get_payload())
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# Split in 80 column lines
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chunks = [
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body[i : i + BASE64_LINELENGTH]
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for i in range(0, len(body), BASE64_LINELENGTH)
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]
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part.set_payload("\r\n".join(chunks))
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return msg
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